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Wide-angle lens and imaging equipment

A technology of wide-angle lens and imaging surface, which is applied in the field of imaging lens to achieve good thermal stability, eliminate ghost, and shorten the effect of back focus

Active Publication Date: 2021-06-01
合肥联创光学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the lenses on the existing market are difficult to meet the above requirements

Method used

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  • Wide-angle lens and imaging equipment
  • Wide-angle lens and imaging equipment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0066] see figure 1 , which is a schematic structural view of the wide-angle lens 100 provided in the first embodiment of the present invention, the wide-angle lens 100 includes in sequence from the object side to the imaging surface along the optical axis: a first lens L1, a second lens L2, a third lens L3, and a diaphragm ST, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, and filter G1.

[0067] The first lens L1 has negative refractive power, the object side S1 of the first lens is a convex surface, and the image side S2 of the first lens is a concave surface.

[0068] The second lens L2 has negative refractive power, the object side S3 of the second lens is concave, and the image side S4 of the second lens is convex.

[0069] The third lens L3 has positive refractive power, the object side S5 of the third lens is concave, and the image side S6 of the third lens is convex.

[0070] The fourth lens L4 has positive refractive power, the object side S7 of the...

no. 2 example

[0083] see image 3 , shows a structural diagram of the wide-angle lens 200 provided by the second embodiment. The wide-angle lens 200 among the present embodiment is roughly the same as the wide-angle lens 100 among the first embodiment, the difference is that the second lens L2 of the wide-angle lens 200 among the present embodiment has positive refractive power, and the object side surface S5 of the third lens L3 is The plane (the plane can be regarded as a spherical surface with an infinite radius of curvature), and the radius of curvature of each lens, the distance between the lenses and the selection of materials are different; among them, setting the object side S5 of the third lens as a plane can make the tolerance of the system better, And the plane is easy to process, the yield rate is high, and the production is convenient.

[0084] Table 3 shows relevant parameters of each lens of the wide-angle lens 200 provided in this embodiment.

[0085] table 3

[0086] ...

no. 3 example

[0092] see Figure 5 , shows the structure diagram of the wide-angle lens 300 provided by the third embodiment. The wide-angle lens 300 among the present embodiment is roughly the same as the wide-angle lens 100 among the first embodiment, the difference is that the second lens L2 of the wide-angle lens 300 among the present embodiment has positive refractive power, and the object side surface S5 of the third lens L3 is The convex surface, the object side S9 of the fifth lens L5 is a plane, the image side S11 of the sixth lens L6 is a plane, and the radius of curvature, distance between lenses and material selection of each lens are different. The setting of the plane greatly reduces the processing cost of the lens, and effectively improves the tolerance of the system, and the processability is better.

[0093] The relevant parameters of each lens of the wide-angle lens 300 provided in this embodiment are shown in Table 5.

[0094] table 5

[0095]

[0096] The relevant ...

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Abstract

The invention discloses a wide-angle lens and imaging equipment, and the wide-angle lens sequentially comprises a first lens with negative focal power from an object side to an imaging surface along an optical axis, wherein the object side surface is a convex surface, and the image side surface is a concave surface; a second lens having focal power, wherein the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; a third lens having positive focal power, wherein the image side surface of the third lens is a convex surface; a diaphragm; a fourth lens having positive focal power, whereinthe object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; a fifth lens having positive focal power, whereinthe object side surface of the fifth lens is a convex surface or a plane, and the image side surface of the fifth lens is a convex surface; a sixth lens having negative focal power, wherein the object side surface of the sixth lens is a concave surface; and a seventh lens having positive focal power, whereinthe object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface, wherein the fifth lens and the sixth lens form a bonding body. The wide-angle lens at least comprises an aspheric lens. The wide-angle lens has the advantages of large aperture, high pixel and good thermal stability.

Description

technical field [0001] The invention relates to the technical field of imaging lenses, in particular to a wide-angle lens and imaging equipment. Background technique [0002] At present, with the development of autonomous driving technology and the intensification of market demand, many countries have promulgated relevant policies to promote the development of autonomous driving, which has greatly promoted the development of related industries of autonomous driving. Components will also usher in rapid development. [0003] Due to the complex and changeable application environment of automobiles and high safety performance requirements, higher requirements are put forward for the optical lenses installed in the automatic driving assistance system, especially the lenses used in the front of the vehicle, not only must have a wider viewing angle, It is also necessary to ensure high-quality image output under different lighting conditions during the day and night. At the same ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/06G02B13/18G02B13/00
CPCG02B13/0045G02B13/006G02B13/06
Inventor 魏文哲王克民曾吉勇
Owner 合肥联创光学有限公司
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